ANSWER #2: "I think it's Americans taking out Americans. I don't think it's one guy, I think it's a group--probably from the right--that's fed up with the way America works."

ANSWER #3: "Probably an American acting alone; not necessarily a nutjob. Probably stole the anthrax years ago and has been waiting for a chance to use it. So it's someone with access and a high degree of intelligence. But not politically motivated, or at least not recognizably so."

ANSWER #4: "I still think the Taliban is behind it--or some American traitors working for the Taliban."